ozone: Fix the way platform tests link ozone

ui/ozone/ozone.gyp

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
     # Normally, the external_ozone_platform* variables below can be
     # overridden by supplement.gypi which must exist exactly one level
     # below the top-level src directory. They can now also be set in
@@ skipping 65 matching lines @@
         'public/ozone_switches.h',
         'public/surface_factory_ozone.cc',
         'public/surface_factory_ozone.h',
         'public/surface_ozone_canvas.h',
         'public/surface_ozone_egl.cc',
         'public/surface_ozone_egl.h',
         'public/system_input_injector.h',
       ],
     },
     {
-      # GN version: //ui/ozone
-      'target_name': 'ozone',
-      'type': '<(component)',
+      # GN version: //ui/ozone:platform
+      'target_name': 'ozone_platform',
+      'type': 'static_library',
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/ipc/ipc.gyp:ipc',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/ui/display/display.gyp:display_types',
         '<(DEPTH)/ui/display/display.gyp:display_util',
         '<(DEPTH)/ui/events/events.gyp:events',
         '<(DEPTH)/ui/events/devices/events_devices.gyp:events_devices',
         '<(DEPTH)/ui/events/ozone/events_ozone.gyp:events_ozone',
         '<(DEPTH)/ui/gfx/gfx.gyp:gfx',
@@ skipping 89 matching lines @@
       ],
       'conditions': [
         ['use_udev == 0', {
           'sources/': [
             ['exclude', '_udev\\.(h|cc)$'],
           ],
         }],
       ],
     },
     {
+      # GN version: //ui/ozone
+      'target_name': 'ozone',
+      'type': '<(component)',
+      'sources': [
+        'empty.cc',
+      ],
+      'dependencies': [
+        'ozone_platform',
+      ],
+    },
+    {
       'target_name': 'ozone_unittests',
       'type': '<(gtest_target_type)',
       'sources': [
         'run_all_unittests.cc',
       ],
       'dependencies': [
-        'ozone',
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         '../../testing/gtest.gyp:gtest',
         '../gfx/gfx.gyp:gfx_geometry',
         '<@(external_ozone_platform_unittest_deps)',
         '<@(internal_ozone_platform_unittest_deps)',
       ],
     },
     {
       'target_name': 'vgem_map',
@@ skipping 35 matching lines @@
         'platform/headless/headless.gypi',
       ],
     }],
     ['<(ozone_platform_wayland) == 1', {
       'includes': [
         'platform/wayland/wayland.gypi',
       ],
     }],
   ],
 }